Portrait Mode Only for tiktok?

Hi, I have a Xiaomi Pad 6 that I have been using for 2 years now. majority of the time, I use it in portrait mode since I use it for mainly use it for tiktok and note taking. Recently I have been planning to use my tablet in horizontal mode, when unlocking the screen rotation, TikTok is also in horizontal mode which makes it hard to watch. Is there a way to be in horizontal mode, but keep TikTok ONLY in portrait? thanks!